問題詳情

【題組】66.The average human heart, beating at 72 beats per minute, has two ________ on each side of the heart.
(A) cracks
(B) chambers
(C) models
(D) paces

參考答案

答案：B
難度：困難0.285714
統計：A(0),B(2),C(2),D(2),E(0)